The style guide lists seven eighths as a noun and notes it is the less common spelling.

In the survey, seven-eighths of respondents chose option A.

At the charity basketball game, the seven-footers towered over everyone else, making each dunk a crowd favorite.

Sailors gathered on the quay to watch the seven-masted clipper glide into the harbor at dawn.

He sevens out the contestants who fail to reach seven points, reducing the field for the final round.

At the charity basketball game, the local seven-footer dunked effortlessly while smiling for the crowd.

We booked three seven-nights at different hotels to compare their services.

Each seven-night began with the church bell in the old village.

The triple seven glided smoothly onto the runway after a long-haul flight.

The slot machine spit out triple sevens on three consecutive spins, and the players went wild.